Am 17.06.23 um 16:02 schrieb Leo Izen:
On 6/17/23 04:11, Thilo Borgmann wrote:
While the yuvj pixel formats are deprecated lots of code still relies
on them to be set. Without setting a yuvj420p pixel format VP9
decoding ends up incorrectly due to auto conversion.
I oppose this on principle. If there's code that relies on YUVJ being set, then
*that code* needs to be changed so it respects the AVFrame->color_range field.
Which code is working improperly with this?
I don't like adding YUVJ stuff either. If I do
./ffmpeg -i full-range-in.mp4 -c:v libvpx-vp9 -lossless 1 lossless-out.mp4
and then comparing the frames, they are not equal. E.g. by
./ffmpeg -i full-range-in.mp4 -i lossless-out.mp4 -filter_complex ssim -f crc -
they are not 1.0 in ssim terms.
I agree, maybe the same effect can be fixed somewhere else and if so it could
effect more codecs than VP9. You (or anyone) have an idea?
Thanks,
Thilo
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